Title :
Closely Spaced Paths Effect Mitigation for Indoor Location Systems
Author :
Szumny, Rafal ; Kurek, Krzysztof ; Yashchyshyn, Yevhen ; Modelski, Jozef
Author_Institution :
Warsaw Univ. of Technol., Warsaw
Abstract :
Paper presents a proposal of method for closely spaced paths mitigation for indoor location system based on spread spectrum signals. At the beginning issue of closely spaced paths influence for the accuracy of TO A determination is explained. In the following part results of indoor propagation simulations are presented. These simulations show relationship between delays and directions of arrival of power delay profile components. The proposal of simple four-element null steering antenna array, which can mitigate this effect, is proposed. The paper contains also results of measurements showing influence of multipath propagation to coarse code synchronization.
Keywords :
antenna arrays; direction-of-arrival estimation; indoor radio; spread spectrum communication; time-of-arrival estimation; closely spaced paths mitigation; directions of arrival; four-element null steering antenna array; indoor location systems; indoor propagation simulations; multipath propagation; power delay profile components; radio wave time of arrival; spread spectrum signals; Antenna arrays; Antenna measurements; Antennas and propagation; Bandwidth; Delay effects; Multiple signal classification; Propagation delay; Proposals; Spaceborne radar; Spread spectrum radar;
Conference_Titel :
Microwaves, Radar & Wireless Communications, 2006. MIKON 2006. International Conference on
Conference_Location :
Krakow
Print_ISBN :
978-83-906662-7-3
DOI :
10.1109/MIKON.2006.4345236
